#include <iostream>
using namespace std;
class Fraction  
{
    public:
     Fraction(int d =1 ,int n =1 );  
     Fraction simplify(Fraction &a);

     Fraction operator- (Fraction &a2);
    // Fraction operator+ (Fraction &a2);
    // Fraction operator* (Fraction &a2);
    //Fraction operator/ (Fraction &a2);

     void ShowFraction(Fraction &a) {
         cout<<" "<<a.num<<"/"<<a.denom<<endl;
     }

    private:
        int denom;
        int num;  
};